Proof of Theorem fnessref
| Step | Hyp | Ref
| Expression |
| 1 | | rabexg 3460 |
. . . . 5

     |
| 2 | 1 | 3ad2ant1 897 |
. . . 4
  Fne   
  |
| 3 | | brin 3388 |
. . . . . 6
  Fne
Ref     Fne 
 Ref      |
| 4 | | fnessref.1 |
. . . . . . . . . 10
  |
| 5 | | eqid 1884 |
. . . . . . . . . 10
 
    
  |
| 6 | 4, 5 | isfne2 15481 |
. . . . . . . . 9
   
 Fne  
    

           |
| 7 | 1, 6 | syl 12 |
. . . . . . . 8

 Fne  
    

           |
| 8 | 7 | 3ad2ant1 897 |
. . . . . . 7
  Fne  Fne
      

           |
| 9 | | simpl1 879 |
. . . . . . . . . . . . . . . 16
   Fne
   |
| 10 | | simpl3 881 |
. . . . . . . . . . . . . . . 16
   Fne
 Fne  |
| 11 | | simpr 350 |
. . . . . . . . . . . . . . . 16
   Fne
   |
| 12 | | fnessex 15484 |
. . . . . . . . . . . . . . . . 17
   Fne   
    |
| 13 | 12 | ex 402 |
. . . . . . . . . . . . . . . 16
  Fne
        |
| 14 | 9, 10, 11, 13 | syl111anc 1100 |
. . . . . . . . . . . . . . 15
   Fne
        |
| 15 | | sseq2 2639 |
. . . . . . . . . . . . . . . . . . . 20
     |
| 16 | 15 | rcla4ev 2381 |
. . . . . . . . . . . . . . . . . . 19
      |
| 17 | 16 | ex 402 |
. . . . . . . . . . . . . . . . . 18
      |
| 18 | 17 | adantl 424 |
. . . . . . . . . . . . . . . . 17
   Fne
  
   |
| 19 | 18 | anim2d 620 |
. . . . . . . . . . . . . . . 16
   Fne
     
    |
| 20 | 19 | reximdv 2202 |
. . . . . . . . . . . . . . 15
   Fne
     
 
    |
| 21 | 14, 20 | syld 30 |
. . . . . . . . . . . . . 14
   Fne
         |
| 22 | 21 | ex 402 |
. . . . . . . . . . . . 13
  Fne   
       |
| 23 | 22 | com23 36 |
. . . . . . . . . . . 12
  Fne   
       |
| 24 | 23 | imp3a 388 |
. . . . . . . . . . 11
  Fne    
      |
| 25 | 24 | 19.23adv 1584 |
. . . . . . . . . 10
  Fne      
 
    |
| 26 | 4 | eleq2i 1961 |
. . . . . . . . . . 11
    |
| 27 | | eluni 3180 |
. . . . . . . . . . 11
        |
| 28 | 26, 27 | bitri 190 |
. . . . . . . . . 10
       |
| 29 | | elunirab 3190 |
. . . . . . . . . 10
  
        |
| 30 | 25, 28, 29 | 3imtr4g 612 |
. . . . . . . . 9
  Fne         |
| 31 | 30 | ssrdv 2622 |
. . . . . . . 8
  Fne       |
| 32 | | ssrab2 2692 |
. . . . . . . . . . 11
 
  |
| 33 | | uniss 3199 |
. . . . . . . . . . 11
           |
| 34 | 32, 33 | ax-mp 7 |
. . . . . . . . . 10
 
    |
| 35 | 34 | a1i 8 |
. . . . . . . . 9
  Fne   
    |
| 36 | | simp2 877 |
. . . . . . . . . 10
  Fne   |
| 37 | | fnessref.2 |
. . . . . . . . . 10
  |
| 38 | 36, 37 | syl6req 1945 |
. . . . . . . . 9
  Fne    |
| 39 | 35, 38 | sseqtrd 2653 |
. . . . . . . 8
  Fne   
   |
| 40 | 31, 39 | eqssd 2633 |
. . . . . . 7
  Fne       |
| 41 | | simpl1 879 |
. . . . . . . . . . 11
   Fne
     |
| 42 | | simpl3 881 |
. . . . . . . . . . 11
   Fne
   Fne  |
| 43 | | simprl 450 |
. . . . . . . . . . 11
   Fne
     |
| 44 | | simprr 451 |
. . . . . . . . . . 11
   Fne
     |
| 45 | | fnessex 15484 |
. . . . . . . . . . 11
   Fne   
    |
| 46 | 41, 42, 43, 44, 45 | syl31anc 1103 |
. . . . . . . . . 10
   Fne
        |
| 47 | | simpl 346 |
. . . . . . . . . . . . . . 15
       |
| 48 | 47 | a1i 8 |
. . . . . . . . . . . . . 14
   Fne
           |
| 49 | | sseq2 2639 |
. . . . . . . . . . . . . . . . . . 19
     |
| 50 | 49 | rcla4ev 2381 |
. . . . . . . . . . . . . . . . . 18
      |
| 51 | 50 | expcom 403 |
. . . . . . . . . . . . . . . . 17
      |
| 52 | 51 | ad2antll 443 |
. . . . . . . . . . . . . . . 16
          |
| 53 | 52 | com12 14 |
. . . . . . . . . . . . . . 15
          |
| 54 | 53 | ad2antrl 442 |
. . . . . . . . . . . . . 14
   Fne
            |
| 55 | 48, 54 | jcad 661 |
. . . . . . . . . . . . 13
   Fne
              |
| 56 | | sseq1 2637 |
. . . . . . . . . . . . . . 15
     |
| 57 | 56 | rexbidv 2124 |
. . . . . . . . . . . . . 14
       |
| 58 | 57 | elrab 2414 |
. . . . . . . . . . . . 13



  
   |
| 59 | 55, 58 | syl6ibr 230 |
. . . . . . . . . . . 12
   Fne
        
     |
| 60 | | simpr 350 |
. . . . . . . . . . . . 13
         |
| 61 | 60 | a1i 8 |
. . . . . . . . . . . 12
   Fne
             |
| 62 | 59, 61 | jcad 661 |
. . . . . . . . . . 11
   Fne
           
      |
| 63 | 62 | reximdv2 2200 |
. . . . . . . . . 10
   Fne
    
  


      |
| 64 | 46, 63 | mpd 29 |
. . . . . . . . 9
   Fne
           |
| 65 | 64 | ex 402 |
. . . . . . . 8
  Fne     
       |
| 66 | 65 | r19.21aivv 2183 |
. . . . . . 7
  Fne           |
| 67 | 8, 40, 66 | mpbir2and 802 |
. . . . . 6
  Fne Fne 
   |
| 68 | 4, 5 | isref 15488 |
. . . . . . . . 9
   
 Ref  
    
          |
| 69 | 1, 68 | syl 12 |
. . . . . . . 8

 Ref  
    
          |
| 70 | 69 | 3ad2ant1 897 |
. . . . . . 7
  Fne  Ref
      
          |
| 71 | | sseq2 2639 |
. . . . . . . . . . . . 13
     |
| 72 | 71 | cbvrexv 2281 |
. . . . . . . . . . . 12
     |
| 73 | 72 | biimpi 168 |
. . . . . . . . . . 11
     |
| 74 | 73 | adantl 424 |
. . . . . . . . . 10
    
  |
| 75 | 74 | a1i 8 |
. . . . . . . . 9
  Fne   
     |
| 76 | | sseq1 2637 |
. . . . . . . . . . 11
     |
| 77 | 76 | rexbidv 2124 |
. . . . . . . . . 10
       |
| 78 | 77 | elrab 2414 |
. . . . . . . . 9
  
  
   |
| 79 | 75, 78 | syl5ib 223 |
. . . . . . . 8
  Fne    

   |
| 80 | 79 | r19.21aiv 2175 |
. . . . . . 7
  Fne         |
| 81 | 70, 40, 80 | mpbir2and 802 |
. . . . . 6
  Fne Ref 
   |
| 82 | 3, 67, 81 | sylanbrc 527 |
. . . . 5
  Fne  Fne Ref      |
| 83 | 82, 32 | jctil 316 |
. . . 4
  Fne   
  Fne Ref       |
| 84 | | sseq1 2637 |
. . . . . 6
  
   
    |
| 85 | | breq2 3342 |
. . . . . 6
  
   Fne
Ref  Fne Ref       |
| 86 | 84, 85 | anbi12d 690 |
. . . . 5
  
    Fne Ref     
 Fne Ref  
     |
| 87 | 86 | cla4egv 2365 |
. . . 4
   
   
  Fne Ref       
 Fne Ref     |
| 88 | 2, 83, 87 | sylc 83 |
. . 3
  Fne     Fne
Ref    |
| 89 | 88 | 3expia 1069 |
. 2
    Fne     Fne Ref     |
| 90 | | simpll 448 |
. . . . 5
      Fne
Ref     |
| 91 | | inss1 2812 |
. . . . . . 7
Fne Ref
Fne |
| 92 | 91 | ssbri 3379 |
. . . . . 6
  Fne
Ref Fne  |
| 93 | 92 | ad2antll 443 |
. . . . 5
      Fne
Ref   Fne  |
| 94 | | simprl 450 |
. . . . . 6
      Fne
Ref     |
| 95 | | visset 2295 |
. . . . . . . . . 10
 |
| 96 | | eqid 1884 |
. . . . . . . . . . 11
   |
| 97 | 4, 96 | fnebas 15483 |
. . . . . . . . . 10
  Fne    |
| 98 | 95, 97 | mpan 759 |
. . . . . . . . 9
 Fne
   |
| 99 | 92, 98 | syl 12 |
. . . . . . . 8
  Fne
Ref    |
| 100 | 99 | ad2antll 443 |
. . . . . . 7
      Fne
Ref      |
| 101 | | simplr 449 |
. . . . . . 7
      Fne
Ref     |
| 102 | 100, 101 | eqtr3d 1927 |
. . . . . 6
      Fne
Ref      |
| 103 | 96, 37 | fness 15491 |
. . . . . 6
    Fne  |
| 104 | 90, 94, 102, 103 | syl111anc 1100 |
. . . . 5
      Fne
Ref   Fne  |
| 105 | | fnetr 15495 |
. . . . 5
  Fne Fne Fne  |
| 106 | 90, 93, 104, 105 | syl111anc 1100 |
. . . 4
      Fne
Ref   Fne  |
| 107 | 106 | ex 402 |
. . 3
      Fne
Ref  Fne   |
| 108 | 107 | 19.23adv 1584 |
. 2
      
 Fne Ref  Fne   |
| 109 | 89, 108 | impbid 574 |
1
    Fne     Fne
Ref     |